We've seen our fairshare of inventive political posters these past two weeks, but one piece of campaign paraphernalia has thus far been flying under the radar: the campaign button.

As history has proven, when done right, the small political pin can pack a big punch. So why settle on a single designer or slogan when you have the best designers in the world willing to help out? That's the idea behind the Hillary Clinton campaign's The Forty-Five Pin Project: Everyone from Stephen Doyle to Michael Bierut to Louise Fili has designed their own button in support of the campaign to make Clinton the 45th president of the United States.

Political buttons date as far back as the first presidential campaign, when supporters bore metal buttons engraved with "Long live the president"—an unimaginative take on "Long live the king"—over George Washington's initials. Abraham Lincoln's campaign also inspired supporters to wear campaign buttons, both in the form of stick pins and buttons that hung from the lapel by a string. The kind of political button we're familiar with today, however, wasn't popularized until the 1890s, courtesy of the Newark, New Jersey, company Whitehead & Hoag Co. The company purchased the patent for celluloid and used the material to cover a small plastic disc overlaid with a printed slogan. The same process is still used for making for buttons today.

Since then, political buttons have both donned and inspired some of the most memorable political slogans in history: I Like Ike, the considerably-more-scandalous grassroots buttons supporting Richard "Dick" Nixon, and John McCain supporters' "NOBAMA" pin of 2008. The designers featured in The Forty-Five Pin Project continue that tradition by both riffing on existing slogans and inventing new ones.